Often involves lowering prices, but not always; sometimes to save more you need to spend more on a per item basis. If you buy a razor for $1 and you can use it for 10 shaves, it is 100% more expensive than a razor for $2 that you can use for 40 shaves. This example is simple but true and captures the distinction between price and cost.

Sometimes involves reducing unnecessary or excessive consumption (i.e. waste). If companies roll out a course that trains employees with company cars to drive more economically and ecologically, it is possible to save money. A trained driver whose vehicle only consumes 7 gallons of fuel per 100 miles instead of 7.7 allows the company to reduce their fuel costs by 10% (excluding the costs related to the training, which are to be deducted).